Cretaceous Stratigraphy of the San Juan Basin Caswell Silver, 1951, Pp

Total Page:16

File Type:pdf, Size:1020Kb

Cretaceous Stratigraphy of the San Juan Basin Caswell Silver, 1951, Pp New Mexico Geological Society Downloaded from: http://nmgs.nmt.edu/publications/guidebooks/2 Cretaceous stratigraphy of the San Juan Basin Caswell Silver, 1951, pp. 104-118 in: San Juan Basin (New Mexico and Arizona), Smith, C. T.; Silver, C.; [eds.], New Mexico Geological Society 2nd Annual Fall Field Conference Guidebook, 163 p. This is one of many related papers that were included in the 1951 NMGS Fall Field Conference Guidebook. Annual NMGS Fall Field Conference Guidebooks Since 1950, the New Mexico Geological Society has held an annual Fall Field Conference that visits some region of New Mexico (or surrounding states). Always well attended, these conferences provide a guidebook to participants. Besides detailed road logs, the guidebooks contain many well written, edited, and peer-reviewed papers. These books have set the national standard for geologic guidebooks and are an important reference for anyone working in or around New Mexico. Free Downloads The New Mexico Geological Society has decided to make our peer-reviewed Fall Field Conference guidebook papers available for free download. Non-members will have access to guidebook papers, but not from the last two years. Members will have access to all papers. This is in keeping with our mission of promoting interest, research, and cooperation regarding geology in New Mexico. However, guidebook sales represent a significant proportion of the societies' operating budget. Therefore, only research papers will be made available for download. Road logs, mini-papers, maps, stratigraphic charts, and other selected content will remain available only in the printed guidebooks. This will encourage researchers to purchase the printed guidebooks, which are essential references for geologic research in New Mexico and surrounding areas. Copyright Information Publications of the New Mexico Geological Society, printed and electronic, are protected by the copyright laws of the United States. No material from our website or printed and electronic publications may be reprinted or redistributed without our permission. Contact us for permission to reprint portions of any of our publications. One printed copy of any materials from our website or our print and electronic publications may be made for individual use without our permission. Teachers and students may make unlimited copies for educational use. Any other use of these materials requires permission. This page is intentionally left blank to maintain order of facing pages. n NEW MEXICO GEOLOGICAL SOCIETY * SECOND FIELD CONFERENCE * SAN JUAN BASIN HI I CRETACEOUS STRATIGRAPHY OF THE a broadUniform variation has beenestablished which SAN JUAN BASIN is illustratedby Figure I. Sandstonepredominates to J thesouthwest, shale to thenortheast; marine deposits make ¯ mm CaswellSilver ~ up theentire section to thenortheast whereas deposits ConsultingGeologist to thesouthwest are of intertonguingmarine and contlnentaifacies. I Possiblyfew systems of rocksin westernUnited Sears,Hunt, and Hendricks(1941 , p. 102)reviewed Stateshave been written about more than the Cre- theconcept, in a paperwhich has becomea classic, thatthe deposits under discussion were laid down in a g taceousrocks of theSan JuanBasin. The publications gm listedat theend of thispaper include many papers broadshallow trough that extended across the area in describingthese rocks in everypart of theBasin and lateCretaceous time. The general orientation of the adjoiningareas with a wealthof detailnot possible shorelinewas northwest to southeastand fluctuations [] here.Thispaper will not re-describe all the strati- in theposition of thisshoreline were generally in a II graphicunits. The subject of thispaper is thesequence northeastto southwestdirection. Further, they elaborated of bedsof differinglithology, the lateral variations theconcept first stated by Lee(1915, p. 28)that both the in lithologyof these beds and their relations to the transgressiveandregressive deposits were laid down economicdeposits of coal,oil and gasthat have been duringcontinued sinking of thetrough and thatboth II foundand may possiblybe foundin theSan JuanBasin. transgressiveor regressive deposits were a reflection Theworks of previousauthors are drawn upon freely of therate of sinkingin relationto thesupply of HI forthis purpose. If afterreading this paper newcomers material.Figure 2 fromSears, Hunt, and Hendricks havean understandingof the thickness and position of (1941,p. 105)shows the theoretical progression. This | theCretaceous layered rocks and an understandingof wasborne out by the "widespreadoccurrence of trans- thepossible distribution of the contained fluids, the itionzones between shale and overlying regressive ¯ author’spurpose will have been served, sandstoneand by theextent of thicknessand uniformity [] of suchsandstones. With continued subsidence there TheCretaceous sediments of thecentral part of wouldalso be Opportunityfor the development of thick i theSan Juan Basin can be Iogically:divldedinto coal-bearingcoastal-swamp deposits behind and en- ¯ twomajor groups: the older and lowergroup which croachingupon the beachsands as the sandsgrew up- I includesall the sediments deposited while marine conditions ward and seaward. " (Ibid, p. 101).As regression enduredand theupper and younger transitional group continuedflood-plain deposits encroached upon the [] whichbridged the transition from marine to wholly near-shareand coastal deposits. At suchrime as the continentalconditions of deposition.If one considers rateof sinkingin thetrough exceeded the supply of theduration of marineCretaceous sedimentation in materialregression ceased and the sea again trans- thecentral part of thebasin as extendingfrom the gressedthe land to the southwest.The upwardsuccession n baseof theDakota sandstone to thetop of thePictured of sedimentswas the reverse of thatduring regression U Cliffssandstone, the valuable stratigraphic reference coastaldeposits building upward to thesouthwest over intervalof theolder group is established(See Figure i.) flood-plaindeposits, which were in turnfollowed by R Thisinterval contains most of thecommercial deposits of near-shoresands and marine sands. oil andgas that have been found in Cretaceousrocks of thebasin at thistime, as wellas mostof theyet un- Age of theFormations. discovereddeposits. This interval lies across theSan Earlyworkers in theBasin were perplexed by the ¯ JuanBasin as a sedimentaryblanket of almostuniform conflictingpaleontologic data relating to theage of [] thickness.Over much of thebasin this interval is made thevarious lithalogic units, It wasnot until the up entirelyof clasticsand is constantin thicknesswith- formationswere mapped on a strictlylithologic basis in a fewhundred feet of 4,700.However, there is a disregardingageconsiderations that the present clear ¯ remarkableuniformity in theVariation in composition stratigraphlcrelationships became evident. As early Ill of thisblanket. In allbut a fewplaces the bottom and as 1915Lee (p. 36-37) pointed out that it wasthe tophorizons consist of sandstonea few hundred feet customthen to assigna sandstoneto theDakota if it [] thick.Between these containing sandstone horizons occurredimmediately below shale known from fossil n ! ! 104 I NEW MEXICO GEOLOGICAL SOCIETY * SECOND FIELD CONFERENCE * SAN JUAN IBASIN ! evidenceto be of Bentonage and thatthe Dakota DakotaSandstone. of onelocality was not the exact time equivalent "TheDakota sandstone," in thewords of Gregoryl I of theDakota of otherlocalities. The transgressive (1917,p. 72)"is highly variable in structure,texture; natureof the’Dakotashown by Lee(1915) and the and composition.It is characterizedmore by a transgressiveandregressive Mesaverde sandstones persistentcombination of features than by theper- I describedby Sears,Hunt,andHenrlcks,(1941)and sistenceof any givenbed. The baseis commonlybut ¯ Pike(1947) have established clearly the fact that by no meansuniversally marked by conglomerateand theseformations cut across time lines and cannot be the topis in manyplaces a coarsebrownor gray sand- definedsolely in termsof age.Figure 3 is a time stonebed but may be a groupof interbeddedsandstones i correlationchart which shows the time relation of andshales or whollysandy shale of yellowor gray thevarious units in theBasin referred to thestandard tones.Coal lenses occur prevailingly in the middle ¯ timescale of theGreat Plains. This figure is in- of theDakota but are found in allpositions from top I herentlyinaccurate as the foregoing discussion has to bottom.The formationis everywherelenticular; shown.:The age of theseformations can onlybe lensesand wedgesof sandstoneof conglomerate, discussedin termsof a specificlocality, of shale,and of coaltens of feetor a fewinches thickoverlap, appear, and disappear along the strike i LowerCretaceous Rocks (?) andvertically in a mostcapricious manner. " The Rocksof earlyCretaceous age havebeen abovegeneral description in the opinion of thisauthor tentativelyidentified by Reeslde (1944) only in the is thebest heretofor written on theDakota sandstone northernpart of theBasin near the town of Dolores of theSan Juan Basin and contains within it cluesto I in MontezumaCounty, Colorado, where they have theerratic production history of thisunit. Other a thicknessof approximately100feet.: They consist morecasual observers in theBasin have attempted to of white,medium to fine-grainedsandstone and green systematizethe Dakota.Prevalent are suchexpressions andgray shale. Similar rocks of likethickness appear I as "the secondDakota,
Recommended publications
  • Emerging Oil and Gas Development in Northwestern New Mexico HORIZONTAL GALLUP / MANCOS PLAY
    Emerging Oil and Gas Development in Northwestern New Mexico HORIZONTAL GALLUP / MANCOS PLAY Gallup / Mancos Oil Play Northwestern New Mexico Bob Just, Petroleum Geologist, Ron Lloyd, Petroleum Geologist Robert Anderson, Branch Chief / Petroleum Geophysicist Assistant Secretary – Indian Affairs, Division of Energy and Mineral Development Introduction of the EnCana well have had cumulative production ranging from around 7,800 to 21,000 barrels of oil A new oil exploration play is beginning to develop and 114 million to 345 million cubic feet of gas. These in Sandoval and San Juan Counties, New Mexico. A production values are relatively poor except that Calgary based company (with offices in Denver, CO), water production is low, ranging from 1,000 to 3,400 Encana Oil and Gas (Encana) has recently horizontally barrels cumulative. It appears the horizontal portion drilled and produced oil from the Cretaceous age of the EnCana well is in the same zone as the older Gallup sandstone. These wells offset unleased Navajo vertical wells. allotted lands and it is anticipated that Encana and other oil and gas companies will be very interested in leasing Navajo allotment tracts as soon as possible. Early Play Development and Reported Results One of Encana’s wells, the Lybrook #H36-2307 (located in se se 32-23n- 7w, Figure 1) was reported flowing at a rate of 838 mcfgpd (natural gas) and 786 bopd (oil) from a lateral leg in the Gallup sandstone formation. Daily production through the initial 30-day period was around 440 barrels of oil per day. This well is a horizontal well with a 4,100 foot lateral section.
    [Show full text]
  • Stratigraphy and Paleontology of Mid-Cretaceous Rocks in Minnesota and Contiguous Areas
    Stratigraphy and Paleontology of Mid-Cretaceous Rocks in Minnesota and Contiguous Areas GEOLOGICAL SURVEY PROFESSIONAL PAPER 1253 Stratigraphy and Paleontology of Mid-Cretaceous Rocks in Minnesota and Contiguous Areas By WILLIAM A. COBBAN and E. A. MEREWETHER Molluscan Fossil Record from the Northeastern Part of the Upper Cretaceous Seaway, Western Interior By WILLIAM A. COBBAN Lower Upper Cretaceous Strata in Minnesota and Adjacent Areas-Time-Stratigraphic Correlations. and Structural Attitudes By E. A. M EREWETHER GEOLOGICAL SURVEY PROFESSIONAL PAPER 1 2 53 UNITED STATES GOVERNMENT PRINTING OFFICE, WASHINGTON 1983 UNITED STATES DEPARTMENT OF THE INTERIOR JAMES G. WATT, Secretary GEOLOGICAL SURVEY Dallas L. Peck, Director Library of Congress Cataloging in Publication Data Cobban, William Aubrey, 1916 Stratigraphy and paleontology of mid-Cretaceous rocks in Minnesota and contiguous areas. (Geological Survey Professional Paper 1253) Bibliography: 52 p. Supt. of Docs. no.: I 19.16 A. Molluscan fossil record from the northeastern part of the Upper Cretaceous seaway, Western Interior by William A. Cobban. B. Lower Upper Cretaceous strata in Minnesota and adjacent areas-time-stratigraphic correlations and structural attitudes by E. A. Merewether. I. Mollusks, Fossil-Middle West. 2. Geology, Stratigraphic-Cretaceous. 3. Geology-Middle West. 4. Paleontology-Cretaceous. 5. Paleontology-Middle West. I. Merewether, E. A. (Edward Allen), 1930. II. Title. III. Series. QE687.C6 551.7'7'09776 81--607803 AACR2 For sale by the Distribution Branch, U.S.
    [Show full text]
  • High-Resolution Correlation of the Upper Cretaceous Stratigraphy Between the Book Cliffs and the Western Henry Mountains Syncline, Utah, U.S.A
    University of Nebraska - Lincoln DigitalCommons@University of Nebraska - Lincoln Dissertations & Theses in Earth and Atmospheric Earth and Atmospheric Sciences, Department of Sciences 5-2012 HIGH-RESOLUTION CORRELATION OF THE UPPER CRETACEOUS STRATIGRAPHY BETWEEN THE BOOK CLIFFS AND THE WESTERN HENRY MOUNTAINS SYNCLINE, UTAH, U.S.A. Drew L. Seymour University of Nebraska, [email protected] Follow this and additional works at: http://digitalcommons.unl.edu/geoscidiss Part of the Geology Commons, Sedimentology Commons, and the Stratigraphy Commons Seymour, Drew L., "HIGH-RESOLUTION CORRELATION OF THE UPPER CRETACEOUS STRATIGRAPHY BETWEEN THE BOOK CLIFFS AND THE WESTERN HENRY MOUNTAINS SYNCLINE, UTAH, U.S.A." (2012). Dissertations & Theses in Earth and Atmospheric Sciences. 88. http://digitalcommons.unl.edu/geoscidiss/88 This Article is brought to you for free and open access by the Earth and Atmospheric Sciences, Department of at DigitalCommons@University of Nebraska - Lincoln. It has been accepted for inclusion in Dissertations & Theses in Earth and Atmospheric Sciences by an authorized administrator of DigitalCommons@University of Nebraska - Lincoln. HIGH-RESOLUTION CORRELATION OF THE UPPER CRETACEOUS STRATIGRAPHY BETWEEN THE BOOK CLIFFS AND THE WESTERN HENRY MOUNTAINS SYNCLINE, UTAH, U.S.A. By Drew L. Seymour A THESIS Presented to the Faculty of The Graduate College at the University of Nebraska In Partial Fulfillment of Requirements For Degree of Master of Science Major: Earth and Atmospheric Sciences Under the Supervision of Professor Christopher R. Fielding Lincoln, NE May, 2012 HIGH-RESOLUTION CORRELATION OF THE UPPER CRETACEOUS STRATIGRAPHY BETWEEN THE BOOK CLIFFS AND THE WESTERN HENRY MOUNTAINS SYNCLINE, UTAH. U.S.A. Drew L. Seymour, M.S.
    [Show full text]
  • Hydrogeology and Stratigraphy of the Dakota Formation in Northwest Iowa
    WATER SUPPLY HYDROGEOLOGY AND J.A. MUNTER BULLETIN G.A. LUDVIGSON NUMBER 13 STRATIGRAPHY OF THE B.J. BUNKER 1983 DAKOTA FORMATION IN NORTHWEST IOWA Iowa Geological Survey Donald L. Koch State Geologist and Director 123 North Capitol Street Iowa City, Iowa 52242 IOWA GEOLOGICAL SURVEY WATER-SUPPLY BULLETIN NO. 13 1983 HYDROGEOLOGY AND STRATIGRAPHY OF THE DAKOTA FORMATION IN NORTHWEST IOWA J. A. Munter G. A. Ludvigson B. J. Bunker Iowa Geological Survey Iowa Geological Survey Donald L. Koch Director and State Geologist 123 North Capitol Street Iowa City, Iowa 52242 Foreword An assessment of the quantity and quality of water available from the Dakota (Sandstone) Formation 1n northwest Iowa is presented in this report. The as sessment was undertaken to provide quantitative information on the hydrology of the Dakota aquifer system to the Iowa Natural Resources Council for alloca tion of water for irrigation, largely as a consequence of the 1976-77 drought. Most area wells for domestic, livestock, and irrigation purposes only partial ly penetrated the Dakota Formation. Consequently, the long-term effects of significant increases in water withdrawals could not be assessed on the basis of existing wells. Acquisition of new data was based upon a drilling program designed to penetrate the entire sequence of Dakota sediments at key loca tions, after a thorough inventory and analysis of existing data. Definition of the distribution, thickness, and lateral and vertical changes in composition of the Dakota Formation has permitted the recognition of two mem bers. Additionally, Identification of the rock units that underlie the Dakota Formation has contributed greatly to our knowledge of the regional geology of northwest Iowa and the upper midwest.
    [Show full text]
  • Variability of Nanopore Systems in the Lincoln Limestone, Denver-Julesburg Basin, Colorado, Usa
    VARIABILITY OF NANOPORE SYSTEMS IN THE LINCOLN LIMESTONE, DENVER-JULESBURG BASIN, COLORADO, USA By Brandon Franklin Werner Chase B.A., University of Colorado, Boulder, 2016 Undergraduate Thesis submitted to the Faculty of the Undergraduate School of the University of Colorado’s Department of Geological Sciences 2016 Committee: David Budd – Geological Sciences – Advisor Charles Stern – Geological Sciences Tyler Lansford - Classics ABSTRACT: With a shift to exploiting unconventional petroleum plays in the United States to support energy consumption, understanding the nanopore systems in those unconventional resources becomes important for future exploitation. The goal of this study is to characterize the pore systems of the Cretaceous Lincoln Limestone found in the Denver-Julesburg (DJ) Basin in order to test the hypothesis that lithologic variability has a control on pore characteristics and total porosity. The Lincoln Limestone represents a possible reservoir interval in close proximity to a source interval, the Hartland Shale, which directly overlies it, thus making it a potentially profitable future exploration target. Pore networks in the Lincoln were characterized using AR-milled rock surfaces run through a scanning electron microscope (SEM) for image capture, image analysis with Avizio 9 software, and mineralogical characterization by X- Ray fluorescence (XRF). Seven samples were chosen for analysis from a single core taken from one well in the DJ basin. Five of the samples span the roughly 70-90 ft thick Lincoln Limestone and the other two come from right above and right below the Lincoln. The seven samples span the range of lithologic and porosity variability in the Lincoln Limestone. They have normalized volumes of carbonate that range from 6.0% to 70.6% (mostly as calcite); clay content ranges from 14.8% to 55.2%.
    [Show full text]
  • 26 Petroleum Geology of the Basal Niobrara Sandstone
    PETROLEUM GEOLOGY OF THE BASAL NIOBRARA SANDSTONE WEST PUERTO CHIQUITO FIELD RIO ARRIBA COUNTY NEW MEXICO USA By Thomas A. Arthur 26 A thesis submitted to the Faculty and the Board of Trustees of the Colorado School of Mines in partial fulfillment of the requirements for the degree of Master of Science (Geology). Golden, Colorado Date____________ Signed: Thomas A. Arthur Signed: Dr. Stephen A. Sonnenberg Thesis Advisor Golden, Colorado Date ____________ Signed: Dr. John D. Humphrey, Department Head Department of Geology and Geological Engineering ii ABSTRACT The basal Niobrara sandstone in the eastern San Juan Basin is an important oil producing reservoir. The West Puerto Chiquito (WPC) Field has produced approximately 18 million barrels of oil from Fort Hays age equivalent sandstones. Most of the Late Cretaceous oil producing stratigraphic traps that have been identified in the Rocky Mountain region are associated with unconformities. The boundary between the Carlile Shale and Niobrara is a well- known regional unconformity that has been extensively studied on the west side of the San Juan Basin in association with large oil fields such as Bisti and Horseshoe. A study of well log correlation, outcrop, core and source rock analysis was conducted in order to identify the resource potential of the Niobrara sandstone in the eastern part of the San Juan Basin. The Niobrara Sandstone is encased within 2000 feet of organic-rich, thermally mature Mancos source rock. Core analyses, including petrographic thin sections help to characterize the porosity and permeability of this tight reservoir. Surface lineaments were studied in order to identify reservoir connectivity.
    [Show full text]
  • Blue River Valley Stratigraphic Chart
    Blue River Valley Hydrogeologic Geologic Period Phase Stratigraphic Unit Unit Modern Alluvium and outwash deposits Alluvial Aquifer Quaternary Glacial deposits Glacial deposits Glaciation Older stream and outwash terrace Local perched deposits aquifer Troublesome Formation Local aquifer Neogene Extension Volcanic rocks Volcanics Paleogene Transition Paleogene and Cretaceous intrusive Crystalline rocks bedrock Laramide Pierre Shale Smoky Hill Member Fort Hayes Limestone Pierre confining Niobrara Niobrara Formation Cretaceous unit Interior Carlile Shale Seaway Greenhorn Limestone Graneros Shale Benton Group Dakota Sandstone Dakota Aquifer Morrison Formation Morrison Aquifer Jurassic Mesozoic Entrada Sandstone Entrada Aquifer Sandstones Chinle confining Triassic Chinle Formation unit Permian Maroon Formation Ancestral Maroon-Minturn Rocky Aquifer Mountains Minturn Formation Pennsylvanian Mississippian No strata Devonian Chaffee Group Paleozoic Silurian Mississippian- Carbonates Cambrian Ordovician Manitou Formation carbonate aquifer Dotsero Formation and Cambrian Sawatch Sandstone Crystalline rocks of igneous and Crystalline Precambrian Precambrian metamorphic origin in mountainous bedrock region Table 12a-05-01. Blue River Valley stratigraphic chart. Blue River Valley Unit Thickness Hydrogeologic Geologic Period Phase Stratigraphic Unit Physical Characteristics Hydrologic Characteristics (ft) Unit Well to poorly-sorted, uncemented sands, silts and gravels along modern Modern Alluvium and outwash deposits >35 Alluvial Aquifer streams and
    [Show full text]
  • Forgotten Crocodile from the Kirtland Formation, San Juan Basin, New
    posed that the narial cavities of Para- Wima1l- saurolophuswere vocal resonating chambers' Goniopholiskirtlandicus Apparently included with this material shippedto Wiman was a partial skull that lromthe Wiman describedas a new speciesof croc- forgottencrocodile odile, Goniopholis kirtlandicus. Wiman publisheda descriptionof G. kirtlandicusin Basin, 1932in the Bulletin of the GeologicalInstitute KirtlandFormation, San Juan of IJppsala. Notice of this specieshas not appearedin any Americanpublication. Klilin NewMexico (1955)presented a descriptionand illustration of the speciesin French, but essentially repeatedWiman (1932). byDonald L. Wolberg, Vertebrate Paleontologist, NewMexico Bureau of lVlinesand Mineral Resources, Socorro, NIM Localityinformation for Crocodilian bone, armor, and teeth are Goni o p holi s kir t landicus common in Late Cretaceous and Early Ter- The skeletalmaterial referred to Gonio- tiary deposits of the San Juan Basin and pholis kirtlandicus includesmost of the right elsewhere.In the Fruitland and Kirtland For- side of a skull, a squamosalfragment, and a mations of the San Juan Basin, Late Creta- portion of dorsal plate. The referral of the ceous crocodiles were important carnivores of dorsalplate probably represents an interpreta- the reconstructed stream and stream-bank tion of the proximity of the material when community (Wolberg, 1980). In the Kirtland found. Figs. I and 2, taken from Wiman Formation, a mesosuchian crocodile, Gonio- (1932),illustrate this material. pholis kirtlandicus, discovered by Charles H. Wiman(1932, p. 181)recorded the follow- Sternbergin the early 1920'sand not described ing locality data, provided by Sternberg: until 1932 by Carl Wiman, has been all but of Crocodile.Kirtland shalesa 100feet ignored since its description and referral. "Skull below the Ojo Alamo Sandstonein the blue Specimensreferred to other crocodilian genera cley.
    [Show full text]
  • Stratigraphy of the Upper Cretaceous Fox Hills Sandstone and Adjacent
    Stratigraphy of the Upper Cretaceous Fox Hills Sandstone and AdJa(-erit Parts of the Lewis Sliale and Lance Formation, East Flank of the Rock Springs Uplift, Southwest lo U.S. OEOLOGI AL SURVEY PROFESSIONAL PAPER 1532 Stratigraphy of the Upper Cretaceous Fox Hills Sandstone and Adjacent Parts of the Lewis Shale and Lance Formation, East Flank of the Rock Springs Uplift, Southwest Wyoming By HENRYW. ROEHLER U.S. GEOLOGICAL SURVEY PROFESSIONAL PAPER 1532 Description of three of/lapping barrier shorelines along the western margins of the interior seaway of North America UNITED STATES GOVERNMENT PRINTING OFFICE, WASHINGTON : 1993 U.S. DEPARTMENT OF THE INTERIOR BRUCE BABBITT, Secretary U.S. GEOLOGICAL SURVEY Dallas L. Peck, Director Any use of trade, product, or firm names in this publication is for descriptive purposes only and does not imply endorsement by the U.S. Government. Library of Congress Cataloging-in-Publication Data Roehler, Henry W. Stratigraphy of the Upper Cretaceous Fox Hills sandstone and adjacent parts of the Lewis shale and Lance formation, east flank of the Rock Springs Uplift, southwest Wyoming / by Henry W. Roehler. p. cm. (U.S. Geological Survey professional paper ; 1532) Includes bibliographical references. Supt.ofDocs.no.: I19.16:P1532 1. Geology, Stratigraphic Cretaceous. 2. Geology Wyoming. 3. Fox Hills Formation. I. Geological Survey (U.S.). II. Title. III. Series. QE688.R64 1993 551.7T09787 dc20 92-36645 CIP For sale by USGS Map Distribution Box 25286, Building 810 Denver Federal Center Denver, CO 80225 CONTENTS Page Page Abstract......................................................................................... 1 Stratigraphy Continued Introduction................................................................................... 1 Formations exposed on the east flank of the Rock Springs Description and accessibility of the study area ................
    [Show full text]
  • Redalyc.STRATIGRAPHIC ARCHITECTURE of UPPER
    Boletín de Geología ISSN: 0120-0283 [email protected] Universidad Industrial de Santander Colombia Àlvarez, M. STRATIGRAPHIC ARCHITECTURE OF UPPER CRETACEOUS GALLUP CLASTIC WEDGE. SHALLOW MARINE AND COASTAL PLAIN STRATA: GALLUP SANDSTONE, MANCOS SHALE AND CREVASSE CANYON FORMATION, SAN JUAN BASIN, NEW MEXICO Boletín de Geología, vol. 28, núm. 1, enero-junio, 2006, pp. 11-48 Universidad Industrial de Santander Bucaramanga, Colombia Available in: http://www.redalyc.org/articulo.oa?id=349631991001 How to cite Complete issue Scientific Information System More information about this article Network of Scientific Journals from Latin America, the Caribbean, Spain and Portugal Journal's homepage in redalyc.org Non-profit academic project, developed under the open access initiative Boletín de Geología Vol. 28, No. 1, enero-junio de 2006 STRATIGRAPHIC ARCHITECTURE OF UPPER CRETACEOUS GALLUP CLASTIC WEDGE. SHALLOW MARINE AND COASTAL PLAIN STRATA: GALLUP SANDSTONE, MANCOS SHALE AND CREVASSE CANYON FORMATION, SAN JUAN BASIN, NEW MEXICO Àlvarez, M.1 ABSTRACT A 3-D stratigraphic architecture and facies distribution framework of upper cretaceous coastal plain and shallow marine strata was established in the Western San Juan basin, New Mexico. Strata are represented by the Turonian-Coniacian Gallup Sandstone, Mancos shale and Crevasse Canyon Formations. This high-resolution genetic stratigraphic study was conducted in a 1000 km2 area, and used 2000 m of measured section calibrated with 1200 m of outcrop gamma ray from 25 sections and 85 plugs. Twenty short-term cycles account for the internal distribution of facies within five facies tracts and reveal a large degree of compartmentalization. Seven intermediate-term cycles compose a long-term cycle.
    [Show full text]
  • Notes on Paleocene and Lower Eocene Mammal Horizons of Northern New Mexico and Southern Colorado
    56.9(1181:78.9). Article XXXII.- NOTES ON PALEOCENE AND LOWER EOCENE MAMMAL HORIZONS OF NORTHERN NEW MEXICO AND SOUTHERN COLORADO. BY WALTER GRANGER. PLATES XCVII AND XCVIII. The purpose of the present short paper is to indicate some of the results of the Eocene exploration conducted by the writer, with the assistance of Mr. George Olsen, in the San Juan Basin in 1916. It is hoped that the fol- lowing notes may be of some aid to future Eocene collecting in this region and possibly also to detailed geologic plotting. Three separate localities were examined, viz.: the Torrejon of Angel Peak, lying south of the San Juan River; the Torrejon of the Animas Valley, between Aztec and Cedar Hill; a set of later beds in Colorado, lying north of the Denver and Rio Grande Railway, between Los Pifios and Piedra Rivers. The American Museum expedition of 1913 visited nearly all of the Paleocene localities of the San Juan Basin from which fossils had previously been obtained, made extensive collections and summarized the strati- graphic results in a paper published the following year.1 These localities are all on the south side of the San Juan River and extend in a long line from the vicinity of Ojo Alamo eastward to the Puerco River below Cuba. Exposures lying to the north near the San Juan and in the Animas Valley were known to be Paleocene but for lack of time were not examined that year. The Angel Peak Region. The exposures at Angel Peak are in the form of a gigantic crater cut out of a fairly level grass-covered plain to a depth of several hundred feet and with a diameter of three to four miles.
    [Show full text]
  • Upper Cenomanian Foraminifers from the Southern Part of the San Juan Basin, New Mexico
    Upper Cenomanian Foraminifers from the Southern Part of the San Juan Basin, New Mexico U.S. GEOLOGICAL SURVEY BULLETIN 1808-N AVAILABILITY OF BOOKS AND MAPS OF THE U.S. GEOLOGICAL SURVEY Instructions on ordering publications of the U.S. Geological Survey, along with the last offerings, are given in the current-year issues of the monthly catalog "New Publications of the U.S. Geological Survey." Prices of available U.S. Geological Survey publications released prior to the current year are listed in the most recent annual "Price and Availability List" Publications that are listed in various U.S. Geological Survey catalogs (see back inside cover) but not listed in the most recent annual "Price and Availability List" are no longer available. Prices of reports released to the open files are given in the listing "U.S. Geological Survey Open-File Reports," updated monthly, which is for sale in microfiche from the U.S. Geological Survey Books and Open-File Reports Sales, Box 25286, Denver, CO 80225. Order U.S. Geological Survey publications by mail or over the counter from the offices given below. BY MAIL OVER THE COUNTER Books Books Professional Papers, Bulletins, Water-Supply Papers, Tech­ Books of the U.S. Geological Survey are available over the niques of Water-Resources Investigations, Circulars, publications counter at the following U.S. Geological Survey offices, all of of general interest (such as leaflets, pamphlets, booklets), single which are authorized agents of the Superintendent of Documents. copies of periodicals (Earthquakes & Volcanoes. Preliminary De­ termination of Epicenters), and some miscellaneous reports, includ­ ANCHORAGE, Alaska-4230 University Dr., Rm.
    [Show full text]